Which of the following computes a combined value of all pages and stamps the value on the tape media to be used to verify that whole backup?

A differential backup is a backup strategy that only copies data changed since the last full backup, not a mechanism for verifying data integrity.

D2D2T (Disk-to-Disk-to-Tape) describes a tiered backup strategy where data is first stored on disk, then transferred to tape, unrelated to data integrity verification.

A page checksum verifies the integrity of individual data pages or blocks, whereas a backup checksum calculates a combined value for the entire backup for whole backup verification.

A backup checksum computes a unique, combined value of all data pages or blocks within an entire backup set. This checksum is then stored alongside the backup data on the tape media, allowing for later verification of the backup's integrity and completeness during restoration.